Tang Ming

Multiplexed polarization-OTDR system for multi-event detection

A novel scheme of polarization optical time domain reflectometry (POTDR) with a high degree of polarization was proposed for multi-event detection. Multiple 2×2 optical fiber couplers and fiber mirrors were employed for the multiplexed POTDR system. The system can be used for multi-event detection while the signals signal-to-noise ratio be improved significantly and the temporal depolarization effect can be almost completely suppressed. Without performing any data averaging, the intrusion event (action of removing fiber) can be detected and located precisely/instantaneously with good stability. Also the frequency components of vibration events can be obtained with a large dynamic range. In this paper intrusion behavior with low frequency and up to 950Hz vibration frequency has been detected simultaneously while the pulse repetition frequency is 2KHz. It shows a very good potential in intrusion detection, vibration frequency measurement, etc.

A Strain Insensitive Temperature Sensor Based on In-fiber Integrated Multipath Interferometer

We proposed and experimentally demonstrated an in-fiber integrated multipath interferometer using all-solid multi-core fiber for temperature sensing applications. A high temperature sensitivity of 130.6pm/centigrade and a record low strain-to-temperature cross sensitivity of 1.95×10-3 centigrade/μϵ were achieved.

Simultaneous both inter-symbol and inter-channel interference mitigation for Sub-Nyquist WDM Superchannel Systems

A filtering bandwidth insensitive joint signal processing is proposed for sub-Nyquist superchannel. Both ICI and ISI cancellation are achieved over a wide range of filter bandwidth for 50GHz-spaced 56 GBaud PM-QPSK superchannel

Investigation on the Wavelength Dependent Crosstalk of Multicore Fibers

We investigate the wavelength dependent crosstalk of MCF. After fabrication and characterization, we find that the crosstalk increases with the operation wavelength at rate of 0.1dB/nm for both homogeneous MCF and quasi-homogeneous MCF.